Originally Posted by RYAN TCAD
Yeh - it only took them three years to get around to doing it. But at least they did it straight after the first signs of it failing on them!
One should get one's facts straight if one is going to peddle crap.
The failures became evident with the previous operator, and a program of blade replacement was well underway before this particular failure, not "straight after the first signs of it failing ..."
From the report, one gleans that there was no "first sign of it failing".
Originally Posted by ATSB INVESTIGATION REPORT
Service bulletin compliance
Although not mandatory, the operator did comply with the engine manufacturer’s service bulletin requirements for the on-wing ultrasonic inspections of the LIP 3 HPT1 blades. The change in the service bulletin compliance for revision 2 of the ultrasonic inspection service bulletin indicates that the engine manufacturer had found that a time parameter was necessary as a measure to prevent further HPT1 blade failures.
Although revision 2 of the blade ultrasonic inspection service bulletin required a reinspection of the HPT 1 blades, the engine manufacturer’s report stated that the scheduled reinspection of this engine was not in time to avoid this event. However, the blade failure occurred only 77 cycles after revision 2 of service bulletin SBBR700-72-900361 was entered against the engine in the maintenance planning system. Had the operator scheduled an earlier inspection, it is most unlikely that this would have been completed before the engine failure event.
The time period allowed by the engine manufacturer between the intial ultrasonic inspection of the blade and the engine failure was too great to detect indications of impending blade cracking and failure. The previous ultrasonic inspection service bulletin SB-BR700-72-900361, assumed that a single inspection would detect any blades that were susceptible to failure. If there had been a requirement for repetitive inspections with previous issues of the service bulletin, the potential for blade failure may have been detected prior to the engine failure.